On 5/19/10 at 7:02 AM, madler at alumni.caltech.edu (Mark Adler) wrote:
>Chris pointed out the Notation package. I hadn't noticed that
>before. (I probably haven't noticed about 90% of what Mathematica
>can do.) So now I can do something like:
><< Notation`
>InfixNotation[NotationTemplateTag[**], Join]
>{1, 2} ** {3, 4}
>{1, 2, 3, 4}
>I'm sure that there's something wrong with using ** as well, but
>anyway you get the idea.
Yes, ** already has a built-in meaning See ref/NonCommutativeMultiply
>I can make up my own symbol.
If you start with some symbol the first thing you should do is
check to see if what you want to use already has a meaning in
Mathematica by looking it up in the Documentation Center. But
you can avoid conflicts and using the Notation package by simply
selecting one of the symbols Mathematica knows about but that
have no pre-defined meaning such as CirclePlus.
See tutorial/OtherMathematicalNotation for a list of operators
Mathematica knows but do not have pre-defined meaning.
Other references that relevant to this are:
tutorial/Operators and
tutorial/InputAndOutputInNotebooksOverview